Don't tempt me! I would like to try a valve amp one day, Radfords seem to be well thought of when paired with Tannoys. I'm trying to stop messing with equipment and just listen to music but you guys make it hard for me to kick the habit!Although the Sugden has quite a low damping factor for a SS amp it might still be overdamping the bass.Valve amps or a Bakoon or Dartzeel SS amp will have higher output impedance and lower damping factor and would be worth a try.